.middleSite{
    height: 60vh;
    width: 70vw;
    background-color: red;
    margin: 0 auto;
}

.leftNav{
    height: 100%;
    width: 30%;
    background-color: gray;
}

.banner{
    width: 70%;
    height: 100%;
    position: relative;
}

.banner img{
    height: 100%;
    width: 100%;
    display: none;
}

.leftTitle {
    height: 14.28%;
    line-height: 354.28%;
    color: white;
    text-align: center;
}

.book {
    display: block;
    height: 20%;
    line-height: 444.28%;
    color: white;
    text-align: center;
    font-size: larger;
    background-color: gray;
    width: 100%;
    
}

.banner button {
    position: absolute;
    top: 45%;
    height: 40px;
    width: 40px;
    border-radius: 50%;
    border: none;
    font-size: large;
    background-color: rgba(255, 255, 255, 0.6);
}

.page {
    display: grid;
    position: absolute;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 10px;
    padding: 20px 20px 40px 20px;
    height: 100%;
    width: 100%;
    background-color: gainsboro;
}

.page img{
    display: block;
    width:  100%;
    height: 100%; 
}

.page a img{
    display: block;
    width:  100%;
    height: 100%; 
}

.playpart{
    background-color: rgb(43, 39, 39);
    color: white;
    width: 70vw;
    height: auto;
    margin: 10px auto;
    border: 1px solid grey;
    padding: 20px;
}

.start video{
    width: 100%;
    height: auto;
}

.three{
    height: 100px;
}

.content{
    width: 70vw;
    height: auto;
    background-color: beige;
    margin: 0 auto;
}

.content h1{
    padding: 20px;
    color: gray;
}

.content h4{
    padding: 20px;
    color: gray;
}